Gas soldering iron



FIG. 1 is a perspective view of a gas soldering iron showing the design;

FIG. 2 is a front side view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom elevation view thereof.

The broken lines are included for the purpose of illustrating portions of the gas soldering iron that form no part of the claimed design. 

CLAIM The ornamental design for a gas soldering iron, as shown and described. 